Make ARMC5 develop profile also size optimized
Make ARMC5 develop profile also size optimized

Due to some historical reasons ARMC 5 compiler behaves very
differently compared to others (GCC, IAR, ARM C 6) as it optimizes
performance rather than size (like the others).

All compilers should behave the same way with the same profile,
thus ARM C 5 should also drive towards size (space).

kjbracey-arm/mbed,mbedmicro/mbed,andcor02/mbed-os,andcor02/mbed-os,andcor02/mbed-os,mbedmicro/mbed,mbedmicro/mbed,andcor02/mbed-os,kjbracey-arm/mbed,kjbracey-arm/mbed,mbedmicro/mbed,kjbracey-arm/mbed,mbedmicro/mbed,andcor02/mbed-os,andcor02/mbed-os